Kremers et al reported the upper limit of normal (95th percentile) for sclerotic glomeruli in a renal biopsy based on the age of the patient. A number of sclerotic glomeruli that exceeds this cannot explained by aging alone. The authors are from the Mayo Clinic and Cleveland Clinic.
Parameters:
(1) age in years, from 18 to 77
(2) number of glomeruli in the renal biopsy, from 1 to 64
Upper limit of normal for sclerotic glomeruli for age
Age in years
1 glomerulus
2 glomeruli
3 or 4 glom
5 to 8 glom
18 to 29
0.5
0.5
0.5
0.5
30 to 34
0.5
0.5
0.5
0.5
35 to 39
0.5
0.5
0.5
0.5
40 to 44
0.5
0.5
0.5
1
45 to 49
0.5
0.5
1
1
50 to 54
1
1
1
1.5
55 to 59
1
1
1.5
1.5
60 to 64
1
1.5
1.5
2
65 to 69
1
2
2
2.5
70 to 74
1
2
2.5
3
75 to 77
1
2
2.5
3
Age in years
9 to 16 glom
17 to 32 glom
33 to 48 glom
49 to 64 glom
18 to 29
1
1
1
1
30 to 34
1
1
1
1.5
35 to 39
1
1.5
2
2
40 to 44
1
2
2.5
3
45 to 49
1.5
2
3
4
50 to 54
2
3
4
5
55 to 59
2
3.5
4.5
6
60 to 64
2.5
4
5.5
7
65 to 69
3
4.5
6.5
8
70 to 74
4
5.5
7.5
9
75 to 77
5
6
8
9.5
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